如何使用ClassLoader加载txt文件？

Question

I have the following code:

 public class App {
   public static void main(String[] args) {
     System.out.println(App.class.getClassLoader().getResource("test.properties"));
     System.out.println(App.class.getClassLoader().getResource("test.txt"));
     System.out.println(App.class.getClassLoader().getResourceAsStream("test.properties"));
     System.out.println(App.class.getClassLoader().getResourceAsStream("test.txt"));
     System.out.println(App.class.getResourceAsStream("test.properties"));
     System.out.println(App.class.getResourceAsStream("test.txt"));
   }
 }

This code gives the following output:

file:/C:/../test.properties 
null 
java.io.BufferedInputStream@18e2b22 
null 
java.io.BufferedInputStream@1cb1c5fa 
null 

Why does ClassLoader refuses to load .txt file?

Updated:

I'm sure that both of my files in the classpath. Classpath is set to /src and both files are in this directory.

Answer 1

很可能你的txt文件不在类路径上

Answer 2

You will need to ensure that any file you want to load using ClassLoader is included in your classpath . Normally resources like that are stored in /src/main/resources which is then included in the classpath.

If you're using Eclipse you can right click on the project in the explorer and go to Properties -> Java Build Path -> Source (Tab) -> Add Folder... (Button) and add the folder structure in there.